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Species limits in the Rhodocoma gigantea (Kunth) Linder complex
Rhodocoma gigantea and Rhodocoma foliosus have been recognised by earlier authors as separate species on the basis of perianth length and shape. Linder (1985) superficially lumped these two species under Rhodocoma gigantea arguing that the difference between the two appear to be brought by ecologica...
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| Format: | Thesis |
| Language: | English |
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Department of Biological Sciences
2017
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| _version_ | 1867613920572735488 |
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| access_status_str | Open Access |
| author | Mafa, Paseka |
| author2 | Linder, H Peter |
| author_browse | Linder, H Peter Mafa, Paseka |
| author_facet | Linder, H Peter Mafa, Paseka |
| author_sort | Mafa, Paseka |
| collection | Thesis |
| description | Rhodocoma gigantea and Rhodocoma foliosus have been recognised by earlier authors as separate species on the basis of perianth length and shape. Linder (1985) superficially lumped these two species under Rhodocoma gigantea arguing that the difference between the two appear to be brought by ecological gradient. Numerical phenetic analyses of 19 quantitative floral morphological characters investigated from 33 herbarium specimens reveal that Rhodocoma gigantea complex consists of two groups. One group corresponded to Rhodocoma gigantea, having longer and wider spikelets, perianth segments and bracts, while the other correspond to Rhodocoma foliosus having shorter and thinner female spikelets, bracts and perianth segments than the former. Minimum spanning tree also reveal the two groups are geographically isolated. The former group occur in the western part of the south coast along the Langeberg in Swellendam and Riversdale districts and the latter is widely distributed on the Outeniekwaberg, Tsitsikama mountains to Zuurberg with outliers reaching as far as Uitenhage. The Gouritz river appears to be the geographical barrier between these two species. The species boundaries of this complex are discussed and the two groups are suggested to be separated based on the phenetic species concepts. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/26494 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:43:49.013Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| publisher | Department of Biological Sciences |
| publisherStr | Department of Biological Sciences |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/26494 Species limits in the Rhodocoma gigantea (Kunth) Linder complex Mafa, Paseka Linder, H Peter Botany Plant Sytematics Rhodocoma gigantea and Rhodocoma foliosus have been recognised by earlier authors as separate species on the basis of perianth length and shape. Linder (1985) superficially lumped these two species under Rhodocoma gigantea arguing that the difference between the two appear to be brought by ecological gradient. Numerical phenetic analyses of 19 quantitative floral morphological characters investigated from 33 herbarium specimens reveal that Rhodocoma gigantea complex consists of two groups. One group corresponded to Rhodocoma gigantea, having longer and wider spikelets, perianth segments and bracts, while the other correspond to Rhodocoma foliosus having shorter and thinner female spikelets, bracts and perianth segments than the former. Minimum spanning tree also reveal the two groups are geographically isolated. The former group occur in the western part of the south coast along the Langeberg in Swellendam and Riversdale districts and the latter is widely distributed on the Outeniekwaberg, Tsitsikama mountains to Zuurberg with outliers reaching as far as Uitenhage. The Gouritz river appears to be the geographical barrier between these two species. The species boundaries of this complex are discussed and the two groups are suggested to be separated based on the phenetic species concepts. 2017-12-08T06:02:26Z 2017-12-08T06:02:26Z 1999 2017-02-03T13:38:02Z Bachelor Thesis Honours BSc (Hons) http://hdl.handle.net/11427/26494 eng application/pdf Department of Biological Sciences Faculty of Science University of Cape Town |
| spellingShingle | Botany Plant Sytematics Mafa, Paseka Species limits in the Rhodocoma gigantea (Kunth) Linder complex |
| thesis_degree_str | Bachelor's / Honours |
| title | Species limits in the Rhodocoma gigantea (Kunth) Linder complex |
| title_full | Species limits in the Rhodocoma gigantea (Kunth) Linder complex |
| title_fullStr | Species limits in the Rhodocoma gigantea (Kunth) Linder complex |
| title_full_unstemmed | Species limits in the Rhodocoma gigantea (Kunth) Linder complex |
| title_short | Species limits in the Rhodocoma gigantea (Kunth) Linder complex |
| title_sort | species limits in the rhodocoma gigantea kunth linder complex |
| topic | Botany Plant Sytematics |
| url | http://hdl.handle.net/11427/26494 |
| work_keys_str_mv | AT mafapaseka specieslimitsintherhodocomagiganteakunthlindercomplex |